Chroma key is most commonly applied using which colors?

Chroma keying, widely known as green screen or blue screen technology, utilizes specific colors to create transparent backgrounds for video production. The correct choice centers on blue and green because these colors are less likely to appear in natural human skin tones and are effective for separating the subject from the background. This allows for seamless replacement of the background with different imagery or video.

Green is particularly favored due to its bright hue and sensitivity in digital video cameras, which ensures that it provides a strong contrast against most skin tones, garments, and other elements commonly found in scenes. Blue is often used as an alternative, especially in certain lighting conditions or with subjects that might clash with green, such as those wearing green clothing.

The other color combinations presented are less effective for chroma keying techniques because they either include colors that can easily conflict with the subjects being filmed or do not offer the same reliability in creating a clean, effective background removal.